Using powder weights around starting loads in multiple rifles should be no problem, but make sure you full length size the cases.
The Hornady interlock 150gr spire points (#3031) shoot well in my 308, but were about 10 times the price of your 180's when I last bought some in the late 1990's! The projectile is your major cost reloading, any reputable brand cup n core bullet soft point will do for goats. I'd go with whatever is cheap and available from Hornady, Sierra, Speer, etc.
At close range 30-30 style bullets are devastating with a mild load out of a 308 (usually going faster than out of a 30-30).
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